How many total no of Cl=O bond are present in structure of perchloric acid.

Answer

To determine the total number of Cl=O (chlorine-oxygen double) bonds present in the structure of perchloric acid (HClO4), we can follow these steps:

### Step 1: Understand the Structure of Perchloric Acid
Perchloric acid has the molecular formula HClO4. In this compound, chlorine (Cl) is the central atom surrounded by four oxygen (O) atoms.

### Step 2: Draw the Lewis Structure
To visualize the bonding, we can draw the Lewis structure of perchloric acid:
- The chlorine atom is bonded to four oxygen atoms.
- Three of these oxygen atoms are connected to chlorine with double bonds (Cl=O).
- One oxygen atom is connected to chlorine with a single bond and also bonded to a hydrogen atom (forming the OH group).

### Step 3: Count the Cl=O Bonds
From the Lewis structure:
- There are three oxygen atoms that are double bonded to chlorine (Cl=O).
- Therefore, the total number of Cl=O bonds in perchloric acid is 3.

### Final Answer
The total number of Cl=O bonds present in the structure of perchloric acid is **3**.

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